Faded picture background with full-color overlay(Intermediate)Tip: For best results with the picture overlay on this slide, use a picture that is the same dimensions as the slide: 7.5” high and 10” wide. If the picture is not the same height and width, resize or crop to those dimensions before following the instructions below. To reproduce the background effects on this slide, do the following:On the Home tab, in the Slides group, click Layout, and then click Blank. Right-click the slide and then click FormatBackground.In the Format Background dialog box, click Fill in the left pane. In the Fill pane, select Picture or texture fill, and then under Insert from, click File. In the Insert Picture dialog box, select a picture, and then click Insert.Also in the Format Background dialog box, in the Fill pane, in the Transparency box, enter 50%.Also in the Format Background dialog box, click PictureColor in the left pane. In the Picture Color pane, under Recolor, click the button next to Presets, and then click Tan, Background color 2 Light (third row, first option from the left). On the Insert tab, in the Images group, click Picture.In the Insert Picture dialog box, select the same picture chosen for the background, and then click Insert. Select the picture. Under Picture Tools, on the Format tab, in the bottom right corner of the Size group, click the Size and Position dialog box launcher. In the Format Picture dialog box, resize or crop the image so that the height is set to 7.5” and the widthis set to 2.25”.To crop the picture, click Crop in the left pane, and in the Crop pane, under Crop position, enter values into the Height, Width, Left, and Top boxes. To resize the picture, click Size in the left pane, and in the Size pane, under Size and rotate, enter values into the Height and Width boxes.Also in the Format Picture dialog box, click Glow and Soft Edges in the left pane, and then in the Glow and Soft Edges pane, under Soft Edges, in the Size box enter 10 point.

Transcript

1.
Coral reefs:
how they are impacted by climate change,
and why it matters.

2.
What are coral reefs ?
Coral reefs are underwater calcium carbonate formations
secreted by corals.
Corals are quite remarkable. They are
constituted of colonies of genetically
identical invertebrates, with an
exoskeleton. “Most corals obtain the
majority of their energy and nutrients from
photosynthetic unicellular algae that live
within the coral's tissue
called zooxanthella” (Source: Wikipedia).
A coral reef thus associates animal,
vegetal and mineral elements.
Florida Keys National Marine
Sanctuary (CC – NOAA - Commander
William Harrigan, NOAA Corps (ret.))

3.
CO2 emissions and ocean acidification
Oceans absorb a large quantity of human activity related CO2
emissions. This causes the formation of carbonic acid, which
increases the level of acidity of oceans.
Oceans have absorbed about 30 % of CO2 through direct
chemical exchange.
“Since 1750, the pH of the ocean’s surface has dropped by 0.1,
a 30 percent change in acidity.”
(Source: NASA -http://earthobservatory.nasa.gov/Features/
CarbonCycle/page5.php)

8.
Scenarios
Current climate change
scenarios are a call for
action.
Even with global
warming limited to two
degrees Celsius, most
coral reefs are at risk of
definitive disappearance.
Detail of an infographic
by: World Bank/
CC BY-NC-ND license http://goo.gl/7JP6Tp

9.
A world without corals?
“Why should we care about coral reefs anyway? Beyond their
clear aesthetic values, they are hotspots of biodiversity. But,
they actually support over 500 million people worldwide, and
about 30 million people depend entirely on coral reefs because
they actually live on them.”
Dr. Janice Lough - “Turn Down the Heat” week 3 lecture.
Photo: Margaret Wertheim.
CC Attribution 2.0 Generic License.

10.
Losing corals reefs would be dramatic for
marine ecosystems and humans who
depend on it.
Yet, corals are already under threat and even limited global
warming of 2 degree Celsius could jeopardize most coral reefs
future.
We must act now, through our individual
action, consumption, communication or vote,
to rapidly reduce CO2 emissions!